diff mbox

[v1,3/4] net: stmmac: dwmac-rk: Use standard devicetree property for phy regulator

Message ID 1421690889-11901-4-git-send-email-romain.perier@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Romain Perier Jan. 19, 2015, 6:08 p.m. UTC
Currently, dwmac-rk uses a custom propety "phy_regulator" to get the name of the
right regulator to use to power on or power off the phy. This commit converts the
driver to use phy-supply devicetree property and the corresponding API, it cleans
the code a bit and make it simpler to maintain.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 61 ++++++++------------------
 1 file changed, 19 insertions(+), 42 deletions(-)

Comments

Heiko Stuebner Jan. 19, 2015, 8:12 p.m. UTC | #1
Am Montag, 19. Januar 2015, 18:08:08 schrieb Romain Perier:
> Currently, dwmac-rk uses a custom propety "phy_regulator" to get the name of
> the right regulator to use to power on or power off the phy. This commit
> converts the driver to use phy-supply devicetree property and the
> corresponding API, it cleans the code a bit and make it simpler to
> maintain.
> 
> Signed-off-by: Romain Perier <romain.perier@gmail.com>

I don't see updated binding documentation in here.

Secondly I think patch4 which changes the property in the evb-rk808 could be 
in here. The change is simple enough and would keep it bisectable without 
needing transistional patches.

And there is the one warning down below.


> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 61
> ++++++++------------------ 1 file changed, 19 insertions(+), 42
> deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c index 06e1637..8a8091c
> 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> @@ -32,7 +32,7 @@
>  struct rk_priv_data {
>  	struct platform_device *pdev;
>  	int phy_iface;
> -	char regulator[32];
> +	struct regulator *regulator;
> 
>  	bool clk_enabled;
>  	bool clock_input;
> @@ -287,46 +287,25 @@ static int gmac_clk_enable(struct rk_priv_data
> *bsp_priv, bool enable)
> 
>  static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
>  {
> -	struct regulator *ldo;
> -	char *ldostr = bsp_priv->regulator;
> +	struct regulator *ldo = bsp_priv->regulator;
>  	int ret;
>  	struct device *dev = &bsp_priv->pdev->dev;
> 
> -	if (!ldostr) {
> -		dev_err(dev, "%s: no ldo found\n", __func__);
> +	if (!ldo) {
> +		dev_err(dev, "%s: no regulator found\n", __func__);
>  		return -1;
>  	}
> 
> -	ldo = regulator_get(NULL, ldostr);
> -	if (!ldo) {
> -		dev_err(dev, "\n%s get ldo %s failed\n", __func__, ldostr);
> +	if (enable) {
> +		ret = regulator_enable(ldo);
> +		if (ret)
> +			dev_err(dev, "%s: fail to enable phy-supply\n",
> +				__func__);
>  	} else {
> -		if (enable) {
> -			if (!regulator_is_enabled(ldo)) {
> -				ret = regulator_enable(ldo);
> -				if (ret != 0)
> -					dev_err(dev, "%s: fail to enable %s\n",
> -						__func__, ldostr);
> -				else
> -					dev_info(dev, "turn on ldo done.\n");
> -			} else {
> -				dev_warn(dev, "%s is enabled before enable",
> -					 ldostr);
> -			}
> -		} else {
> -			if (regulator_is_enabled(ldo)) {
> -				ret = regulator_disable(ldo);
> -				if (ret != 0)
> -					dev_err(dev, "%s: fail to disable %s\n",
> -						__func__, ldostr);
> -				else
> -					dev_info(dev, "turn off ldo done.\n");
> -			} else {
> -				dev_warn(dev, "%s is disabled before disable",
> -					 ldostr);
> -			}
> -		}
> -		regulator_put(ldo);
> +		ret = regulator_disable(ldo);
> +		if (ret)
> +			dev_err(dev, "%s: fail to disable phy-supply\n",
> +				__func__);
>  	}
> 
>  	return 0;
> @@ -346,14 +325,12 @@ static void *rk_gmac_setup(struct platform_device
> *pdev)
> 
>  	bsp_priv->phy_iface = of_get_phy_mode(dev->of_node);
> 
> -	ret = of_property_read_string(dev->of_node, "phy_regulator", &strings);
> -	if (ret) {
> -		dev_warn(dev, "%s: Can not read property: phy_regulator.\n",
> -			 __func__);
> -	} else {
> -		dev_info(dev, "%s: PHY power controlled by regulator(%s).\n",
> -			 __func__, strings);
> -		strcpy(bsp_priv->regulator, strings);
> +	bsp_priv->regulator = devm_regulator_get_optional(dev, "phy");
> +	if (IS_ERR(bsp_priv->regulator)) {
> +		if (PTR_ERR(bsp_priv->regulator) == -EPROBE_DEFER)
> +			return -EPROBE_DEFER;

this should be return ERR_PTR(-EPROBE_DEFER) and produces a warning in its 
current state


> +		dev_err(dev, "no regulator found\n");
> +		bsp_priv->regulator = NULL;
>  	}
> 
>  	ret = of_property_read_string(dev->of_node, "clock_in_out", &strings);
Romain Perier Jan. 20, 2015, 6:55 a.m. UTC | #2
Hi,

Ok I will do these changes. However, the property "phy_regulator" was
not documented in
Documentation/devicetree/bindings/net/rockchip-dwmac.txt ... I can
document it anyway, it has probably been forgotten.

Thanks !

2015-01-19 21:12 GMT+01:00 Heiko Stübner <heiko@sntech.de>:
> Am Montag, 19. Januar 2015, 18:08:08 schrieb Romain Perier:
>> Currently, dwmac-rk uses a custom propety "phy_regulator" to get the name of
>> the right regulator to use to power on or power off the phy. This commit
>> converts the driver to use phy-supply devicetree property and the
>> corresponding API, it cleans the code a bit and make it simpler to
>> maintain.
>>
>> Signed-off-by: Romain Perier <romain.perier@gmail.com>
>
> I don't see updated binding documentation in here.
>
> Secondly I think patch4 which changes the property in the evb-rk808 could be
> in here. The change is simple enough and would keep it bisectable without
> needing transistional patches.
>
> And there is the one warning down below.
>
>
>> ---
>>  drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 61
>> ++++++++------------------ 1 file changed, 19 insertions(+), 42
>> deletions(-)
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
>> b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c index 06e1637..8a8091c
>> 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
>> @@ -32,7 +32,7 @@
>>  struct rk_priv_data {
>>       struct platform_device *pdev;
>>       int phy_iface;
>> -     char regulator[32];
>> +     struct regulator *regulator;
>>
>>       bool clk_enabled;
>>       bool clock_input;
>> @@ -287,46 +287,25 @@ static int gmac_clk_enable(struct rk_priv_data
>> *bsp_priv, bool enable)
>>
>>  static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
>>  {
>> -     struct regulator *ldo;
>> -     char *ldostr = bsp_priv->regulator;
>> +     struct regulator *ldo = bsp_priv->regulator;
>>       int ret;
>>       struct device *dev = &bsp_priv->pdev->dev;
>>
>> -     if (!ldostr) {
>> -             dev_err(dev, "%s: no ldo found\n", __func__);
>> +     if (!ldo) {
>> +             dev_err(dev, "%s: no regulator found\n", __func__);
>>               return -1;
>>       }
>>
>> -     ldo = regulator_get(NULL, ldostr);
>> -     if (!ldo) {
>> -             dev_err(dev, "\n%s get ldo %s failed\n", __func__, ldostr);
>> +     if (enable) {
>> +             ret = regulator_enable(ldo);
>> +             if (ret)
>> +                     dev_err(dev, "%s: fail to enable phy-supply\n",
>> +                             __func__);
>>       } else {
>> -             if (enable) {
>> -                     if (!regulator_is_enabled(ldo)) {
>> -                             ret = regulator_enable(ldo);
>> -                             if (ret != 0)
>> -                                     dev_err(dev, "%s: fail to enable %s\n",
>> -                                             __func__, ldostr);
>> -                             else
>> -                                     dev_info(dev, "turn on ldo done.\n");
>> -                     } else {
>> -                             dev_warn(dev, "%s is enabled before enable",
>> -                                      ldostr);
>> -                     }
>> -             } else {
>> -                     if (regulator_is_enabled(ldo)) {
>> -                             ret = regulator_disable(ldo);
>> -                             if (ret != 0)
>> -                                     dev_err(dev, "%s: fail to disable %s\n",
>> -                                             __func__, ldostr);
>> -                             else
>> -                                     dev_info(dev, "turn off ldo done.\n");
>> -                     } else {
>> -                             dev_warn(dev, "%s is disabled before disable",
>> -                                      ldostr);
>> -                     }
>> -             }
>> -             regulator_put(ldo);
>> +             ret = regulator_disable(ldo);
>> +             if (ret)
>> +                     dev_err(dev, "%s: fail to disable phy-supply\n",
>> +                             __func__);
>>       }
>>
>>       return 0;
>> @@ -346,14 +325,12 @@ static void *rk_gmac_setup(struct platform_device
>> *pdev)
>>
>>       bsp_priv->phy_iface = of_get_phy_mode(dev->of_node);
>>
>> -     ret = of_property_read_string(dev->of_node, "phy_regulator", &strings);
>> -     if (ret) {
>> -             dev_warn(dev, "%s: Can not read property: phy_regulator.\n",
>> -                      __func__);
>> -     } else {
>> -             dev_info(dev, "%s: PHY power controlled by regulator(%s).\n",
>> -                      __func__, strings);
>> -             strcpy(bsp_priv->regulator, strings);
>> +     bsp_priv->regulator = devm_regulator_get_optional(dev, "phy");
>> +     if (IS_ERR(bsp_priv->regulator)) {
>> +             if (PTR_ERR(bsp_priv->regulator) == -EPROBE_DEFER)
>> +                     return -EPROBE_DEFER;
>
> this should be return ERR_PTR(-EPROBE_DEFER) and produces a warning in its
> current state
>
>
>> +             dev_err(dev, "no regulator found\n");
>> +             bsp_priv->regulator = NULL;
>>       }
>>
>>       ret = of_property_read_string(dev->of_node, "clock_in_out", &strings);
>
diff mbox

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 06e1637..8a8091c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -32,7 +32,7 @@ 
 struct rk_priv_data {
 	struct platform_device *pdev;
 	int phy_iface;
-	char regulator[32];
+	struct regulator *regulator;
 
 	bool clk_enabled;
 	bool clock_input;
@@ -287,46 +287,25 @@  static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)
 
 static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
 {
-	struct regulator *ldo;
-	char *ldostr = bsp_priv->regulator;
+	struct regulator *ldo = bsp_priv->regulator;
 	int ret;
 	struct device *dev = &bsp_priv->pdev->dev;
 
-	if (!ldostr) {
-		dev_err(dev, "%s: no ldo found\n", __func__);
+	if (!ldo) {
+		dev_err(dev, "%s: no regulator found\n", __func__);
 		return -1;
 	}
 
-	ldo = regulator_get(NULL, ldostr);
-	if (!ldo) {
-		dev_err(dev, "\n%s get ldo %s failed\n", __func__, ldostr);
+	if (enable) {
+		ret = regulator_enable(ldo);
+		if (ret)
+			dev_err(dev, "%s: fail to enable phy-supply\n",
+				__func__);
 	} else {
-		if (enable) {
-			if (!regulator_is_enabled(ldo)) {
-				ret = regulator_enable(ldo);
-				if (ret != 0)
-					dev_err(dev, "%s: fail to enable %s\n",
-						__func__, ldostr);
-				else
-					dev_info(dev, "turn on ldo done.\n");
-			} else {
-				dev_warn(dev, "%s is enabled before enable",
-					 ldostr);
-			}
-		} else {
-			if (regulator_is_enabled(ldo)) {
-				ret = regulator_disable(ldo);
-				if (ret != 0)
-					dev_err(dev, "%s: fail to disable %s\n",
-						__func__, ldostr);
-				else
-					dev_info(dev, "turn off ldo done.\n");
-			} else {
-				dev_warn(dev, "%s is disabled before disable",
-					 ldostr);
-			}
-		}
-		regulator_put(ldo);
+		ret = regulator_disable(ldo);
+		if (ret)
+			dev_err(dev, "%s: fail to disable phy-supply\n",
+				__func__);
 	}
 
 	return 0;
@@ -346,14 +325,12 @@  static void *rk_gmac_setup(struct platform_device *pdev)
 
 	bsp_priv->phy_iface = of_get_phy_mode(dev->of_node);
 
-	ret = of_property_read_string(dev->of_node, "phy_regulator", &strings);
-	if (ret) {
-		dev_warn(dev, "%s: Can not read property: phy_regulator.\n",
-			 __func__);
-	} else {
-		dev_info(dev, "%s: PHY power controlled by regulator(%s).\n",
-			 __func__, strings);
-		strcpy(bsp_priv->regulator, strings);
+	bsp_priv->regulator = devm_regulator_get_optional(dev, "phy");
+	if (IS_ERR(bsp_priv->regulator)) {
+		if (PTR_ERR(bsp_priv->regulator) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(dev, "no regulator found\n");
+		bsp_priv->regulator = NULL;
 	}
 
 	ret = of_property_read_string(dev->of_node, "clock_in_out", &strings);